Why do Atoms Have Netrons, Protons and electrons?

Question: Why do Atoms Have Netrons, Protons and electrons?
- Keywords:
  atom,
  electron,
  neutron,
  proton
Asked by anon-200943 to Oliver on 4 Mar 2019.
- Oliver Gordon answered on 4 Mar 2019:
  
  That’s quite a tough one to answer… why is anything anything!
  
  Neutrons, Protons and Electrons (or quarks if you want to look closer, or maybe strings if you want to look even closer than that!) are just the building blocks of our universe. That’s what the universe decided we get, so that’s what we get!

Question: Why do Atoms Have Netrons, Protons and electrons?